OAA computing section circular NK 1451 P/Siding Spring 2006R1
The following improved orbital elements, by S. Nakano, are from 52 observations 2006 Sept. 1 to Sept. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.47 arc second. See an orbit on YC 2529. Epoch = 2006 Sept.22.0 TT T = 2006 Sept. 3.67382 +/- 0.01338 (m.e.) TT Peri. = 249.30656 +/- 0.00281 Node = 218.63011 +/- 0.00543 (2000.0) Inc. = 160.01121 +/- 0.00077 q = 1.6710764 +/- 0.0001002 AU e = 0.7023236 +/- 0.0010246 a = 5.6137358 +/- 0.0034426 AU n' = 0.07410135 +/- 0.00006816 P = 13.301 +/- 0.0122350 years (+/- 4.47 day) The predicted orbit for the 2019 return is as follows: T = 2019 Dec. 23.24393 TT Epoch = 2019 Dec. 23.0 TT Peri. = 249.29547 e = 0.7042054 Node = 218.83564 (2000.0) a = 5.6230808 AU Inc. = 160.06865 n'= 0.07391670 q = 1.6632770 AU P = 13.334 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 060902 E12 0.1+ 0.0 060914 E12 0.2- 0.0 060901 E12 0.7- 1.2+ 060908 F84 0.7+ 0.0 060914 415 0.3- 0.4- 060901 E12 0.3- 0.2- 060908 F84 0.1- 0.2+ 060914 415 0.6+ 0.6+ 060901 E12 0.5- 1.3- 060910 F84 0.8- 1.6- 060914 415 0.8- 1.3+ 060901 E12 0.8- 0.1+ 060910 F84 0.7- 1.0- 060915 E12 0.2+ 0.3- 060901 E12 0.0 0.4- 060912 F84 0.3- 0.6- 060915 423 0.5+ 0.4+ 060901 E12 0.4- 0.6- 060912 F84 0.3+ 0.1+ 060917 E12 0.0 0.0 060901 E12 0.5+ 0.1- 060912 F84 0.2+ 0.5+ 060917 E12 0.0 0.1+ 060901 E12 0.1- 0.2- 060912 E12 0.3+ 0.1+ 060918 E12 0.0 0.0 060901 E12 0.9+ 0.3- 060912 E12 0.0 0.1+ 060919 E12 0.0 0.5- 060901 E12 0.8+ 0.7+ 060912 E12 0.3+ 0.1- 060920 E12 0.0 0.2+ 060901 E12 0.0 0.8+ 060913 E12 0.0 0.1- 060920 E12 0.2+ 0.0 060901 E12 0.2+ 1.0+ 060913 423 0.6- 0.4+ 060921 E12 0.1+ 0.2+ 060901 E12 0.2- 0.3- 060913 423 1.0+ 0.2+ 060922 E12 0.1- 0.5+ 060902 E12 0.0 0.0 060913 E12 0.1- 0.1- 060923 E12 0.0 0.1+ 060902 E12 0.3- 0.1- 060913 E12 0.1- 0.1- 060926 E12 0.3- 0.4- 060902 E12 0.3+ 0.1+ 060914 E12 0.3+ 0.1+ 060926 E12 0.0 0.4- 060902 E12 0.3+ 0.0 060914 E12 0.3- 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2007 Apr. 2